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UX281

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ID = 8317
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to UX281 = C-281 = 81 = CV2546 = PH281 = 481
Similar Tubes
Normally replaceable-slightly different:
  4619_WLS ; WLS581
First year 1927 Radios von gestern, 2. Auflage
First Source (s)
May.1927 : Saga of the Vacuumtube, Tyne p.325

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Filament Vf 7.5 Volts / If 1.2 Ampere / Direct /
Literature Taschenbuch zum Röhren-Codex 1948/49   

 
radiotronux281_1.jpg
UX281: J.V.
Jose Vigil

 
ux281_so.png
UX281: ARRL Handbook 1972
Michael Schlör

 
ux281_data.png
UX281: RCA Receiving Tube Manual RC-10
Heinz Höger


Usage in Models 13= 1927 ; 3= 1928? ; 26= 1928 ; 3= 1929? ; 17= 1929 ; 3= 1930?? ; 2= 1930 ; 1= 1931?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):68

UX281*Box
   

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